Hi there. I was looking for an iPod 4th or 5th generation to have a device to just listen to music and I stumbled upon a 7th generation iPod at really low price. The problem is the owner says it is not charging and he didn't use it's original charger and thinks that it is a software problem or the charging port is broken. I thought it might be the junk that accumulated in the port. Can you guys help me ? I don't know wether to buy it or not.